Two men were shot to death in separate attacks within about 15 minutes of each other, one in Austin and one in Back of the Yards, authorities said.

About 9:15 p.m., a man was shot to death inside a Popeyes Louisiana Kitchen, 5500 W. North Ave.

The man, who witnesses said was about 21 years old, was inside a business when he was shot from outside by someone who fled on foot, said Chicago Police News Affairs Officer Amina Greer. He was unresponsive on the scene, she said.

Three workers inside were cleaning up inside as police examined shell casings outside about 10 p.m. Someone fired at least four times from outside the restaurant, piercing a window and striking the man, police said.

An employee who was inside making up an order at the time of the shooting said the gunfire did not sound like shots but instead like someone hitting a table with a hammer.

Just 15 minutes later, a man in his 20s was found shot to death on a sidewalk about 9:30 p.m. in the 5400 block of South Laflin Street, Greer said. He suffered a gunshot wound to the face and was dead on the scene, she said.

Police found him in a gangway next to a house with vacant brick buildings on each side.

About 11:35 p.m., a male was shot in the leg in the 4400 block of South Washtenaw Avenue, Greer said. He was taken to Mount Sinai Hospital in good condition.

Someone shot two teens in the 8400 block of South Constance Avenue about 9:45 p.m., Greer said. A 15-year-old was shot in the chest and taken to Comer Children's Hospital in critical condition and a 16-year-old was grazed in the back and taken to Jackson Park Hospital in good condition.

Earlier, two men were shot in the Englewood neighborhood tonight. The shooting took place about 7:30 p.m. on the 7300 block of South Racine Avenue, and left one man wounded in the back and the other in the foot, police said.

The Chicago Fire Department said the men were taken to hospitals from nearby locations where they were found by emergency personnel.

A 20-year-old man with a wound to the back was taken from 74th and Racine in serious condition to Advocate Christ Medical Center in Oak Lawn, and an 18-year-old man with a wound to the foot was taken from 74th and Aberdeen Street to St. Bernard Hospital, where his condition was stabilized, according to Fire Media reports.